EP0836249B1 - Electrical grounding shroud - Google Patents

Electrical grounding shroud Download PDF

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Publication number
EP0836249B1
EP0836249B1 EP96116389A EP96116389A EP0836249B1 EP 0836249 B1 EP0836249 B1 EP 0836249B1 EP 96116389 A EP96116389 A EP 96116389A EP 96116389 A EP96116389 A EP 96116389A EP 0836249 B1 EP0836249 B1 EP 0836249B1
Authority
EP
European Patent Office
Prior art keywords
frame
shroud assembly
sidewalls
spring
grounding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96116389A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0836249A1 (en
Inventor
Helen Dechelette
Karel Reinier De Vries
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Molex LLC
Original Assignee
Molex LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Molex LLC filed Critical Molex LLC
Priority to EP96116389A priority Critical patent/EP0836249B1/en
Priority to DE69620179T priority patent/DE69620179T2/de
Priority to US08/943,061 priority patent/US5913690A/en
Priority to JP9314166A priority patent/JP3018284B2/ja
Priority to TW087212136U priority patent/TW383938U/zh
Priority to CN97122739A priority patent/CN1114250C/zh
Priority to KR1019970052199A priority patent/KR100282629B1/ko
Publication of EP0836249A1 publication Critical patent/EP0836249A1/en
Application granted granted Critical
Publication of EP0836249B1 publication Critical patent/EP0836249B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/75—Coupling devices for rigid printing circuits or like structures connecting to cables except for flat or ribbon cables

Definitions

  • This invention generally relates to the art of electrical connector systems and, particularly, to a grounding shroud assembly for receiving a cable plug in a back panel wiring board arrangement.
  • grounding structures or shield assemblies are used to receive cable plugs for signal transfer. Often, the cable plugs are insertable next to one another and produce a disconnectable line connection.
  • the electrical characteristics of the printed circuit board, of the male connector and of the female connector all are of importance.
  • the mating distance must be as small as possible.
  • the board or back panel must also be protected against electrical emissions and radiations. This is done through the back panel being of conductive shielding material surrounding or covering the printed circuit board and its electrical components.
  • the grounding shroud assembly of the present invention provides a small distance between the printed circuit board and the cable plug, and it also provides excellent grounding continuity between the board, the grounding panel and the plug connector.
  • a grounding shround assembly according to the preamble of claim 1 is known from "Micropax Grounding Assembly” , IBM Technical Disclosure Builletin, vol. 38, no. 03, March 1995, page 521.
  • the structure is intended to create an independent path from the connector plug shell to the ground plane on the printed circuit board which is not dependent on the intimate contact between the connector halves. Mounting of the assembly in the opening of a panel is not provided.
  • An object, therefore, of the invention is to provide a new and improved grounding shroud assembly of the character described.
  • the assembly is provided for receiving a cable plug on one side of the panel and contact pins from a printed circuit board on an opposite side of the panel.
  • the grounding shroud assembly mounts in an opening in a panel.
  • the assembly includes a generally U-shaped conductive frame including a base and at least a pair of side walls extending from the base. The frame thereby defines a receptacle for receiving the cable plug.
  • the base of the frame has apertures for receiving the contact pins from the printed circuit board.
  • a generally U-shaped conductive spring includes a base and at least a pair of side walls extending from the base for embracing the generally U-shaped frame. The spring facilitates mounting the shroud assembly in the opening in the panel.
  • the base of the spring has apertures in registry with the apertures in the base of the frame for receiving the contact pins therethrough.
  • the frame is fabricated of such material as brass and is thicker and more robust than the spring.
  • the spring is fabricated of thinner springy material such as beryllium copper.
  • the sidewalls of the spring have protrusions for engaging the inner edges of the opening in the panel.
  • the protrusions are formed by integral, outwardly bowed portions of the sidewalls of the spring.
  • the spring also includes portions extending around and into the inside of the sidewalls of the frame for engaging the cable plug. The portions are formed by integral, inwardly bowed portions of the sidewalls of the spring.
  • the frame is shown herein as being elongated and includes a plurality of the springs embracing the frame in a side-by-side relationship.
  • the sidewalls of the frame include slots for mounting a conductive divider plate between the ends of adjacent side-by-side springs.
  • the divider plate forms separate plug-receiving receptacles on opposite sides of the plate.
  • the divider plate includes stop flanges projecting outwardly of the sidewalls of the frame for engaging one side of the panel.
  • the invention is embodied in a grounding shroud assembly, generally designated 12.
  • the assembly is shown in Figure 1 for mounting in an opening 14 in a panel 16 and for receiving a cable plug, generally designated 18, on one side of the panel and contact pins 20 from a printed circuit board 22 on the opposite side of the panel.
  • FIG. 2 shows grounding shroud assembly 12 mounted in opening 14 in panel 16. The assembly also is shown in Figure 2 mounted on printed circuit board 22 with contact pins 20 projecting into the shroud assembly. Cable plug 18 is insertable into the shroud assembly in the direction of arrow "A".
  • printed circuit board 22 is of a generally conventional configuration, with conventional contact pins 20 projecting therefrom.
  • Panel 16 is fabricated of conductive material and is part of a shielding casing for protecting components, such as electrical components on the printed circuit board, against electrical emissions and radiations.
  • cable plug 18 also is of a conventional construction with an outer shield and mounts a plurality of female terminals for receiving contact pins 20. The female terminals are terminated to conductors within shielded or coaxial cables 24.
  • grounding shroud assembly 12 includes two main components, namely a frame, generally designated 26, and one or more springs, generally designated 28.
  • the shroud assembly shown herein is designed for receiving a pair of cable plugs and, therefore, a divider plate (described hereinafter) is used to divide frame 26 into two distinct receptacles for the two plugs.
  • a divider plate (described hereinafter) is used to divide frame 26 into two distinct receptacles for the two plugs.
  • two separate springs 28 are employed.
  • frame 26 of grounding shroud assembly 12 is generally U-shaped and includes a base or bottom wall 30 and a pair of sidewalls 32 extending upwardly from the base.
  • the frame is stamped and formed of conductive sheet metal material, such as brass, and base 30 and sidewalls 32 define a receptacle therebetween for receiving one or more of the cable plugs 18.
  • Frame 26 also includes a plurality of apertures 34, 36 and 38 therethrough for receiving contact pins 20 from printed circuit board 22.
  • Apertures 34 are generally rectangular and freely receive ground pins from the printed circuit board.
  • Apertures 36 are circular and also freely receive ground pins from the printed circuit board.
  • Apertures 38 are circular and larger than apertures 36 and receive signal contact pins from the printed circuit board.
  • Frame 26 further includes slots 40 in sidewalls 32, along with notches 42 in the upper edges of the sidewalls.
  • the slots and notches are provided for mounting a conductive divider plate, as described hereinafter.
  • Tabs 44 project longitudinally outwardly from opposite ends of sidewalls 32, and base 30 includes notches 46 at opposite ends thereof.
  • Tabs 44 are provided for mounting conductive end plates, as described hereinafter.
  • Notches 46 facilitate mounting springs 28.
  • keying tabs 48 are formed out of sidewalls 32 and are bent inwardly of the frame. Unbent keying tabs 48a also are shown in Figures 3 and 4. The keying tabs operate with keying means on cable plugs 18, as described hereinafter.
  • each spring 28 is stamped and formed of conductive spring metal, such as beryllium copper, and includes a base 50 and a pair of upstanding sidewalls 52 extending from the base for embracing the generally U-shaped frame 26.
  • Sidewalls 52 have protrusions in the form of integral outwardly bowed portions 52a for engaging inner edges of opening 14 in panel 16 to mount the grounding shroud assembly in the panel as shown in Figure 2.
  • the spring also includes integral, inwardly bowed portions 52b which extend around and into the inside of sidewalls 32 of frame 26 for frictionally and electrically engaging the outer shield of the cable plug 18.
  • Each spring 28 of grounding shroud assembly 12 includes a plurality of apertures 54, 56 and 58 through base 50 of the spring.
  • Apertures 54 are H-shaped to define a pair of opposing tabs 54a which deform and grip the ground contact pins which extend therethrough. This functions to mount the grounding shroud assembly onto printed circuit board 22 as shown in Figure 2.
  • Apertures 56 are circular and freely receive the remainder of the ground pins from the printed circuit board. All of the apertures for receiving the ground pins are not H-shaped in order to avoid excessive mounting forces.
  • Apertures 58 freely receive the signal contact pins from the printed circuit board.
  • H-shaped apertures 54 in base 50 of spring 28 register with rectangular apertures 34 in base 30 of frame 26; smaller round apertures 56 in the spring(s) register with smaller round apertures 36 in the frame and larger round apertures 58 in the spring register with larger round apertures 38 in the frame.
  • a tab 60 projects outwardly from base 50 at the end of each spring 28, for purposes to be described hereinafter.
  • U-shaped conductive springs 28 are mounted on U-shaped conductive frame 26 by sliding the springs onto opposite ends of the frame in the direction of arrows "B" in Figure 3.
  • Figure 6 shows the two springs fully mounted on and embracing the frame. Once in their fully mounted positions, tabs 60 at the ends of bases 50 of the springs are bent into notches 46 in base 30 of the frame.
  • Figures 6A and 6B show contact pins from the printed circuit board inserted into the apertures in the base of the spring and the base of frame of grounding shroud assembly 12. More particularly, contact pin 20A in Figures 6A and 6B designates a ground pin inserted through H-shaped aperture 54 in the spring and through rectangular aperture 34 in the frame. Opposing tabs 54a grip the ground pin to effectively mount the grounding shroud assembly onto the printed circuit board. Contact pin 20B in Figures 6A and 6B represents another ground pin from the printed circuit board which extends freely through small round aperture 56 in the spring and small round aperture 36 in the frame.
  • Contact pin 20C in Figures 6A and 6B represents a signal pin from the printed circuit board extending freely through larger round aperture 58 in the spring and larger round aperture 38 in the frame.
  • the signal pins pass through larger apertures which are adapted to the impedance characteristics to be achieved with the connector arrangement.
  • a divider plate generally designated 66, is shown to include a generally planar body 68 having a pair of mounting legs 70 projecting downwardly therefrom.
  • a pair of arms 72 are spaced outwardly from opposite edges of the body to define grooves 74.
  • the arms terminate in outwardly projecting stop flanges 76.
  • the divider plate is stamped from conductive sheet metal material approximately the same thickness as the sheet metal material of frame 26.
  • Divider plate 66 is mounted onto frame 26 in the direction of arrow "C" (Fig. 7) until the divider plate assumes a position shown in Figure 8, dividing the frame into two distinct receptacles for a pair of cable plugs 18.
  • sidewalls 32 of the frame move into grooves 74 inside arms 72 of the divider plate, until the bottoms of the grooves seat into notches 42 at the tops of the sidewalls of the frame.
  • Mounting legs 70 at the bottom of the divider plate extend into mounting holes 78 (Fig. 8) in printed circuit board 22.
  • Figure 8 also shows that a pair of end plates, generally designated 80, are used to close the ends of the grounding shroud assembly.
  • End plates 80 are of substantially identical construction to divider plate 66 and, accordingly, like reference numerals have been applied to like portions of the end plates corresponding to the same portions of the divider plate. It can be seen in Figure 8 that the end plates are mounted at the opposite ends of frame 26, with tabs 44 at the opposite ends of sidewalls 32 of the frame press fit into grooves 74 inside arms 72 of the end plates. Mounting legs 70 of the end plates project into mounting holes 78 in printed circuit board 22.
  • the frame With frame 26 being fabricated of a thicker more robust material, such as brass or the like, the frame provides a sturdy structure forming the receptacles for receiving the cable plugs.
  • Springs 28 being fabricated of a thinner springy material, such as beryllium copper or the like, provides a yielding structure for mounting in the panel opening, as well as gripping the plugs and the contact pins in H-shaped apertures 54. Moreover, the unbreached surface of the springs 28 provides shielding against emissions and radiations which the openings provided by the keying tabs 48, 48a may otherwise permit to pass.
  • Figure 9 shows cable plug 18 to include a mating end face 82 having a plurality of passages 84 for receiving contact pins 20 from printed circuit board 22.
  • the passages lead to a plurality of female terminals or contacts within the cable plug and which mate with the contact pins.
  • Mating face 82 is defined by a face 86 mounted on a dielectric housing 88 of the cable plug.
  • Grounding shroud assembly 12 described above in relation to Figures 1-8 and cable plugs 18 include a unique keying system to prevent any given cable plug from being inserted into a wrong receptacle or side of grounding shroud assembly 12. More particularly, Figure 10 shows that opposite sides of housing 88 of the cable plug is provided with a plurality of keying grooves 90. Face plate 86 is provided with a plurality of keying notches 92. The keying notches align with selected ones of keying grooves 90. For instance, in Figure 9, keying grooves 92 at the top of face plate 86 are aligned with the outermost keying grooves 80 of the housing.
  • keying notches 92 at the bottom of face plate 86 are aligned with the first and third keying grooves at the bottom of the housing, as looking from the left in the depiction. Therefore, the top of the cable plug may be keyed differently from the bottom of the cable plug.
  • face plate 86 in Figure 9A is provided with two keying notches at the right-hand end thereof, and face plate 86 in Figure 9B is provided with two keying notches 92 at the left-hand end thereof. Therefore, the cable plug shown in Figure 9A is keyed different from the cable plug shown in Figure 9B.
  • plug housing 88 with a plurality of keying grooves 90 as shown in Figure 9, only some or all of the keying grooves can be exposed for receiving keying tabs 48 of the shroud assembly, simply by changing face plate 86 and its respective, selected arrangement of keying notches 92. Therefore, the entire plug housing does not have to be changed to change the keying arrangement. Only the face plate 86, with a selected arrangement of keying notches 92, must be changed to change the keying system. Similarly, keying tabs 48 in the sidewalls 32 of frame 26 easily are bent inwardly or cut at selected locations corresponding to the locations of the keying notches in the respective cable plug. The keying tabs 48 can be cut with a small cutting tool even with the spring 28 is already in position and preventing access to the exterior of the frame 26.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
EP96116389A 1996-10-12 1996-10-12 Electrical grounding shroud Expired - Lifetime EP0836249B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP96116389A EP0836249B1 (en) 1996-10-12 1996-10-12 Electrical grounding shroud
DE69620179T DE69620179T2 (de) 1996-10-12 1996-10-12 Elektrische Erdungshülle
US08/943,061 US5913690A (en) 1996-10-12 1997-10-02 Electrical grounding shroud
TW087212136U TW383938U (en) 1996-10-12 1997-10-09 Electrical grounding shroud
JP9314166A JP3018284B2 (ja) 1996-10-12 1997-10-09 電気コネクタの接地シュラウド組立体
CN97122739A CN1114250C (zh) 1996-10-12 1997-10-11 电气接地罩
KR1019970052199A KR100282629B1 (ko) 1996-10-12 1997-10-11 전기접지시라우드

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96116389A EP0836249B1 (en) 1996-10-12 1996-10-12 Electrical grounding shroud

Publications (2)

Publication Number Publication Date
EP0836249A1 EP0836249A1 (en) 1998-04-15
EP0836249B1 true EP0836249B1 (en) 2002-03-27

Family

ID=8223291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116389A Expired - Lifetime EP0836249B1 (en) 1996-10-12 1996-10-12 Electrical grounding shroud

Country Status (7)

Country Link
US (1) US5913690A (zh)
EP (1) EP0836249B1 (zh)
JP (1) JP3018284B2 (zh)
KR (1) KR100282629B1 (zh)
CN (1) CN1114250C (zh)
DE (1) DE69620179T2 (zh)
TW (1) TW383938U (zh)

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Also Published As

Publication number Publication date
JP3018284B2 (ja) 2000-03-13
EP0836249A1 (en) 1998-04-15
KR19980032754A (ko) 1998-07-25
CN1186361A (zh) 1998-07-01
KR100282629B1 (ko) 2001-02-15
CN1114250C (zh) 2003-07-09
US5913690A (en) 1999-06-22
DE69620179T2 (de) 2002-11-07
TW383938U (en) 2000-03-01
JPH10189150A (ja) 1998-07-21
DE69620179D1 (de) 2002-05-02

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